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PWT Enterprises, Inc.

Carwashes, Porter, Texas. NPDES permit TX0093483, in force until May 21, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 20 days after each period: form A monthly (10 values)
Last report on file: September 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (10)

Parameter	Statistic	Limit	Months
Oxygen demand, chem. [high level] [COD]	daily average	≤ 300 mg/L	all year
Oxygen demand, chem. [high level] [COD]	daily maximum	≤ 500 mg/L	all year
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	daily average	≤ 20 mg/L	all year
Solids, total suspended	daily maximum	≤ 45 mg/L	all year
Oil & Grease	daily average	≤ 10 mg/L	all year
Oil & Grease	daily maximum	≤ 15 mg/L	all year
Flow, in conduit or thru treatment plant	daily average	≤ .003 MGD	all year
Flow, in conduit or thru treatment plant	daily maximum	≤ .005 MGD	all year

How strict are these limits?

Oil & Grease, daily average 10 mg/L — stricter than 58% of 95 other minor industrial and other permits in Texas; 38% have the same limit
Solids, total suspended, daily maximum 45 mg/L — stricter than 43% of 244 other minor industrial and other permits in Texas; 36% have the same limit
Oil & Grease, daily maximum 15 mg/L — stricter than 21% of 265 other minor industrial and other permits in Texas; 78% have the same limit

Cited limits by parameter: Texas's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/TX0093483 · MCP: https://passage-data.com/mcp